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01:377:371 Lecture Notes - Lecture 5: Brachial Artery, Mean Arterial Pressure, Radial ArteryExam


Department
Exercise Scienc
Course Code
01:377:371
Professor
B Mcfadden
Study Guide
Final

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Terms: relative workload, systolic, diastolic, perceived exertion, Borg scale,
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Purpose: The purpose of this laboratory is to determ1ne the effects of Ns
exercise on heart rate and blood pressure and to examine the relationship
between heart rate and ratings of perceived exertion. One student per group will
perform short exercise bouts at various workloads on:
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Measurements of heart rate (proceeding, during, following) and blood pressure
(before/after) will be obtained to measure the relative intensity of the workloads.
Students will also use the revised Borg Scale to rate perceived exertion after the
treadmill and bicycle ergometer work bouts.
LABORATORY INSTRUCTIONS:
I.
Resting Measurements.
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Each student should determine his or her partner's heart rate, systolic, diastolic
and mean blood pressure while at rest
in
a seated position.
Heart rate will be determined by palpation of the carotid or radial artery.
Take a 15s reading and multiply by 4 to obtain beats per minute (bpm). Take the
average of 3 readings.
Blood pressure will be obtained using a sphygmomanometer. Five blood
pressure readings should be taken using the following procedure: (p.320-321
McArdle
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Wrap cuff around upper arm at heart level snuggly and place stethoscope
below cuff over the brachial artery
2. Close the air-release switch by turning clockwise and inflate cuff to max of
180 mm Hg. (the cuff pressure should exceed the systolic pressure = no
sound as brachial artery is closed)
3. Release cuff gradually (3-5 mm Hg I
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by turning air-release switch
counterclockwise. Record the pressure reading when the first sound is
heard. (systolic BP)
4.
Continue to reduce cuff pressure and record when the sound disappears.
(diastolic BP).
5. Allow arm to rest (>2 min) before repeating the measure. (Switch with
partner)
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Mean arterial pressure is calculated as
(Ps
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indicates the average pressure on arterial vessels. It reflects the longer diastolic
period vs. the systolic period.
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